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ŠUMARSKI LIST 5-6/2006 str. 21     <-- 21 -->        PDF

M. Bobinac: UČINAK PRORJEDA NA PRIRAST STABALA RAZLIČITIH BIOLOŠKIH POLOŽAJA ... Šumarski list br. 5–6, CXXX (2006), 183-191
Stojanović, Lj., (2003): Proredne seče u šumama Stojanović, Lj., V. Stamenković, M. Vučko


bukve (Fagetum moesiacae montanum nudum) vić, M. Krstić, M. Bobinac, (1990): Istra


na posmeđenim rendzinama na krečnjaku, Šum-živanje razvoja, produkcije i najpovoljnijih me


arstvo 3–4, SITŠPD Srbije, Beograd (19–29). toda njege mladih bukovih šuma, Publikacija
Stojanović, Lj., M. Krstić, M. Bobinac, (1985): “Unapređenje šuma i šumarstva regiona Titovo
Proredne seče kao mjere njege u brdskim buko-Užice”, knjiga II, Beograd (131–154).
vim šumama (Fagetum moesiacae montanum Vučković, M., B. Stajić, (2003a): Ocena stanja
asperulosum) na Maglešu, Šumarstvo 4–6, sastojine bukve na bazi osnovnih elemenata rasta,
SITŠPD Srbije, Beograd (43–56). Glasnik Šumarskog fakulteta 86, Šumarski fakul-
S toj ano v i ć , Lj., M. Kr s t ić , M. B o b ina c , (1994): tet Univerziteta u Beogradu, Beograd (95–102).


Proredne seče u bukovim šumama na području Vučković, M., B. Stajić, (2003b): Karakteristike


Brezovice, Posebna publikacija: “Prorede u bu-debljinskog prirasta u sastojinama bukve na po


kovim šumama”, JP “Srbija šume”, Beograd dručju Brezovice. Šumarstvo 1–2, SITŠPD Srbi


(75–85). je, Beograd (165–171).


SUMMARY: The participation and increment of trees in different biological positions
(BP) were analyzed in a middle-aged stand of beech (Fagetum montanum nudum
Jov. 53 = Dentario-Fagetum montanum) growing on deep acid brown soil on
crystalline schist in three sample plots subjected to different silvicultural treatments.


The results are based on breast diameter data and the assessment of biological
position of trees at the end of 1994 and 2002. The analysis included sample plots in
which selective thinning was performed in 1985 (PP-1), 1985 and 1994 (PP-2),
and control sample plot (PP-3).


At the end of 2002, (stand age 50-55), of the total number of trees in the sample
plots, trees in BP-1 accounted for 23.9–27.8 %, in BP-2 for 4.6-12.7 % and in BP-3
for 61.8–71.6 %. Trees in the first biological position participated in the basal area
increment with 81.0–88.0 %, and in the stand basal area with 64.5–68.1 %. Trees in
the third biological position participated in the basal area increment with 5.0-9.0
% an
anand
dd i
iin the stand basal area with 20.5–27.7 %. In the observed period, trees in
BP-thinned sample plots grew on average by 13.53–14.31 m3/ha annually and


P-1
11
i
iin
nn
in the control plot by 11.03 m3/ha. Trees in BP-1 participated in the total volume
increment in thinned plots with 82.0 %–89.0 % and in the control plot with 86.0 %.


In relation to the trees in BP-3, the average annual increase in growth elements
in BP-1 trees was as follows: breast diameter: 9.80–17.00 times, height: 2.63–3.75
times, basal area: 26.00-37.00 times, and volume: 26.30–40.01 times. Compared
with PP-1 and the control plot (PP-3), an increase in growth elements was higher
within PP-2.


The results indicate different effects on the increment of the remaining trees in dependence
on stand thinning intensity. Apart from a positive effect on the dominant
trees, to a certain extent thinning also had positive effects on other biological categories
of trees. However, this is a negligible productive effect in view of the fact that
thinning at this stage of stand development is a necessary silvicultural intervention
aimed at forming trees in the dominant storey and that thinning achieves the best effects
on the increment of this tree category. The higher average increase in breast diameter,
height, basal area, volume and the higher percentage of volume increment in
trees in the first biological position, as well as their higher participation in the basal
area increment and stand volume compared to other tree categories indicate that tending
in young and middle-aged beech stands should primarily be targeted at trees in
the dominant biological position. With timely application of high thinning, trees in
BP-3 can assume an important biological-ecological role of “stabilizer” in stands
standsstands..


K e y w o rd s : beech, middle-aged stand, biological position of trees,selective
thinning, increment